GB 22337-2008Emission standard for community noise (English PDF)

100.1 · LAd () t

Where. LA --- t time the instantaneous sound level A;

The T --- predetermined measurement period.

3.5

Border boundary

By the legal instruments (such as land use permits, real estate license, lease contracts, etc.) determined the owners have the right to use (or ownership)

Place or building boundary. Noise generated by various fixtures, border facilities for its actual area boundary.

GB 22337 2008

3.6

Background noise background noise

Environmental noise is emitted from a sound source other than the sum of the measurement noise source.

3.7

Octave band sound pressure level sound pressure level in octave bands

Used in line with band SPL octave filters measured GB/T 3241 regulations, the measurement bandwidth and center frequency proportional.

Interior noise octave band center frequency spectrum analysis used in this standard is 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, which covers

Frequency range of 22 ~ 707 Hz.

3.8

Diurnal day-time, night, night-time

According to "People's Republic of China Environmental Noise Pollution Prevention Law," "daytime" refers to the 6. 00 hours between; "Night". 00-22

4.1 Boundary noise emission limits

4.1. 1 social life noise sources shall not exceed the boundaries of noise emission limits specified in Table 1.

Table 1 social life noise sources boundary noise emission limits Unit. dB (A)

Outer boundary acoustic environment functional area category time Daytime Nighttime

4.1. 2 can not be the result of noise measurement or measured noise emission sources in the social life at the boundary does not accurately reflect its noise-sensitive construction

Under the influence of the extent of the buildings, the noise measurement shall be carried out in the potentially affected sensitive buildings out the window at 1 m.

4.1. 3 when the social life noise sources and noise-sensitive buildings boundary distance is less than 1 m, shall indoor noise-sensitive structures

Measurement and corresponding limits in Table 1 minus 10 dB (A) as a basis for evaluation.

4.2 structure-borne noise emission limits for indoor fixtures

4.2. 1 in social life noise sources located in the inner noise-sensitive buildings, the noise transmission to the building structure by noise-sensitive

When building an indoor, indoor noise-sensitive buildings shall not exceed the equivalent sound level in Table 2 and Table 3 limits specified.

Table 2 structure-borne noise emission limits for indoor fixed equipment (equivalent sound level) Unit. dB (A)

Category in which the ribbon

Noise-sensitive buildings acoustic environment periods

Rooms Room Type A Class B Class Room

Day Night Day Night

2,3,4 45,355,040

Description. A class room --- refers to the primary purpose of sleep, the need to ensure a quiet room at night, including residential bedrooms, hospital wards, hotel rooms and the like.

Class B refers to the room --- mainly in the daytime, we need to ensure that thinking and mental concentration, normal speech is not disturbed in the room, including classrooms,

Meeting rooms, offices, residential rooms, etc. other than the bedroom.

GB 22337 2008

Table 3 structure-borne noise emission limits for indoor fixtures (octave band sound pressure level) Unit. dB

Noise-sensitive buildings

Live sound environment

Ribbon category

Time

Room type

Octave band center frequency/Hz

Interior noise octave band sound pressure level limit

31.5 63 125 250 500

Daytime A, Class B room 7659483934

Night A, Class B room 6951393024

A daytime class room 7659483934

Class B Rooms 7963524438

A class room at night 6951393024

Class B Rooms 7255433529

2,3,4

A daytime class room 7963524438

Class B Rooms 8267564943

A class room at night 7255433529

Class B Rooms 7659483934

4.2. 2 For non-stationary noise (eg noise elevators etc.) occur during the noise measurements, the maximum sound level does not exceed the limits of the amplitude

Higher than 10 dB (A).

5.1 Measuring Instruments

5.1. 1 measuring instrument with integrated average sound level or ambient noise automatic monitoring instrument, its performance should not be less than GB 3785 and GB/T 17181

Type 2 instruments. Measured 35 dB below the noise should use Type 1 sound level meter, and the measurement range of the measurement noise should meet the needs

want. Calibration instruments should be consistent with GB/T 15173 the Tier 1 or Class 2 acoustic calibrator requirements. When you need the noise spectrum analysis,

Instrument performance should be consistent with GB/T 3241 in the filter requirements.

5.1 2 measurement instruments and calibration of the instrument should be regularly certified by, and in the effective use of life; before each measurement, the test must be after

The amount of live acoustic calibration, its front and rear calibration indication deviation of not greater than 0.5 dB, otherwise the measurement will be invalid.

5.1 3 measuring microphone windscreen.

5.1. 4 measuring instruments Time weighting characteristic is set to "F" file, the sampling intervals of not more than 1 s.

5.2 Measurement conditions

5.2 1 weather conditions. measurements should be carried out in the absence of rain and snow, no lightning weather, wind speed 5 m/s or less. We had special weather strip

When measured member shall take the necessary measures to ensure the accuracy of measurement, together with an indication of the measures taken at the time and weather conditions.

5.2 2 Measurement conditions. measurement of the sound source under test shall be carried out during normal working hours, and working conditions at the time indicated.

5.3 measuring point

5.3 1 measuring point layout

According to the social life noise sources, as well as the layout of the area adjacent to the category of ambient noise sensitive buildings in the social life noise

Sources boundary laid multiple measuring points, including from noise-sensitive buildings closer to the sound source under test as well as a large influence by location.

5.3 The measuring point 2 General Provisions

Under normal circumstances, measuring tap in social life noise sources outside the boundaries 1 m, height of 1.2 m or more, from any distance is not a reflection surface

Less than 1 m position.

5.3 3-point position of the other provisions

5.3. 3.1 When the boundary walled and have affected noise-sensitive structures around the measuring point should be selected in the outer boundary of 1 m, higher than the wall

0.5 m above location.

GB 22337 2008

5.3. 3.2 When the boundary condition can not measure the actual emissions of the sound source (such as a sound source is located at high altitude, the boundary has a sound barrier, etc.) shall be

5.3.2 Setting measuring points, while the noise-sensitive buildings affected by outdoor 1 m at a separate measuring point.

5.3. 3.3 indoor noise measurements, indoor measurement point is located away from any reflective surface at least 0.5 m above, 1.2 m height from the ground,

In the window affected by noise measurements under the direction of the open state.

Fixed sound transmission device structure 5.3. 3.4 social life noise sources to indoor noise-sensitive structures in the interior noise sensitive buildings

Measurement, the measuring point should be away from any reflective surface at least 0.5 m above from the ground 1.2 m, 1 m or more away from outside windows, windows closed under a state measure

the amount. Other possible interference measurements of the sound source under test room (such as televisions, air conditioners, exhaust fans and a loud fluorescent ballasts,

When running out loud clock, etc.) should be closed.

5.4 measurement period

5.4. 1 respectively at daytime and night two measurement periods. There are frequent at night while measuring the maximum sound level when the occasional noise.

5.4 The second test sound source is stationary noise, the use of equivalent sound level 1 min.

5.4. 3 non-stationary noise source under test, measuring the equivalent sound source under test a representative period, if necessary, the sound source is measured on the whole

Equivalent sound level of normal working hours.

5.5 Background noise measurement

5.5 1 Measurement environment. not measured the impact and other sound source is consistent with the measurement of the ambient sound source under test.

5.5 2 measurement period. The length of time and the sound source under test measured the same.

5.6 Measuring records

To be done to measure the noise measurement records. Record shall include. the measured unit name, address, boundary acoustic environment in which the work

Category energy region, weather conditions during the measurement, measuring instruments, instrument calibration, measuring point, measuring time, measurement period, instrument calibration value

(Pre-test, post-test), the main sound source, the measurement conditions, schematic (boundary, the sound source, noise-sensitive buildings, measuring point position, etc.), noise

Measurements, background values, surveyors, Reviewer, Reviewer and other related information.

5.7 measurement result correction

5.7. 1 noise measurement value of the background noise is greater than the difference between the value of 10 dB (A), noise measurement value not corrected.

5.7. 2 measured values of noise and the background noise in the difference value is between 3 ~ 10 dB (A), measured values of noise and background noise difference value rounded

After correction in Table 4.

Table 4 Measurement results correction Unit. dB (A)

The difference between the 34 ~ 56 ~ 10

Correction value --3--2--1

After 5.7 3 noise measurement value of the background noise level by less than 3 dB (A), should take measures to reduce background noise, as the case according to 5.7.1

5.7.2 or execution; still unable to meet the first two requirements, according to relevant provisions of environmental noise monitoring the implementation of the technical specifications.

6.2 The maximum sound level Lmax direct evaluation.

Monitor the implementation of standards 7

This standard by the people's governments above the county level environmental protection administrative department responsible for overseeing implementation.

GB 22337 2008

END: Draft Version (GB 22337-2008)